Table 2  Spearman’s correlation coefficients for longevity ratio and each factor. Total selenium (T-Se); water-soluble selenium (WS-Se).
Year  Sea Fish  Humidity Degree  T-Se  Altitude  SD of Temperature  WS-Se  Freshwater Food  Meat
2000  0.575 **  0.468 **  0.505 **  −0.338 **  −0.502 **  0.401 **  0.123 *  −0.105 *
2010  0.551 **  0.535 **  0.466 **  −0.461**  −0.442 **  0.303 **  0.205 **  −0.129 *
** Correlation significant at p < 0.01 level; * Correlation significant at p < 0.05 level. “SD of temperature” represents standard deviation of monthly mean temperature.